标题： Janus液滴作为催化微电机 显示英文标题

标题： Janus droplet as a catalytic micromotor

摘要： 一种在表面活性剂溶液中具有自推进的Janus液滴，该液滴在液滴表面的一半区域发生反应，被理论研究。 液滴作为催化马达，产生浓度梯度，从而产生由表面张力驱动的运动；自推进速度相当高，$60\; {\rm \mu m/s}$以上。 这种催化马达相较于其他微马达具有几个优势：制造简单，容易实现中性浮力。 与单流体液滴不同，单流体液滴由于对称性破缺不稳定性而表现出自推进，而对于Janus液滴不存在稳定性阈值；因此，液滴半径可以缩小到微米级别。 本文由Denis S. Goldobin在Sergey Sklyaev于2014年6月2日不幸去世后完成并提交。 显示英文摘要

摘要： Self-propulsion of a Janus droplet in a solution of surfactant, which reacts on a half of a drop surface, is studied theoretically. The droplet acts as a catalytic motor creating a concentration gradient, which generates its surface-tension-driven motion; the self-propulsion speed is rather high, $60\; {\rm \mu m/s}$ and more. This catalytic motor has several advantages over other micromotors: simple manufacturing, easily attained neutral buoyancy. In contrast to a single-fluid droplet, which demonstrates a self-propulsion as a result of symmetry breaking instability, for Janus one no stability threshold exists; hence, the droplet radius can be scaled down to micrometers. The paper was finalized and submitted by Denis S. Goldobin after Sergey Sklyaev had sadly passed away on June 2, 2014.